Izuma Seita, who’s not very good at dealing with gyarus, saw Urushibara Yua, a junior in high school and a very popular gyaru, depressed over a broken heart, and consoled her, as he knew that he couldn’t just ignore her. A few days later, Yua showed up dressed in a costume reminiscent of Rinna, the heroine from a smartphone game, which is Seita’s favorite. Not only that, but she also exposed her skin and tried to offer her body to Seita, saying, ‘I wanted to thank you for your kindness’. Yua tearfully apologized to Seita, who refused her offer, saying that she is sorry for causing him trouble. Seita, who thought she was just playing with him anyway, changed his perception of her to see that she may actually be a very sensitive girl. Seita accepted Yua’s plea that if they can’t be together, at least let her “pretend to be his girlfriend” until the wounds of a broken heart are healed. However, this temporary relationship slowly begins to change over time… This is a love story about a dull high school boy haunted by a past broken heart and a younger gyaru who has a lot of experience but is actually very simple-minded.